Makeup Air Units – Sized Right, Shipped Fast
Your exhaust system pulls air out, and without makeup air, your building fights back. Doors slam. HVAC systems strain. Energy bills climb.
Spec the wrong unit and you’re looking at failed inspections, change orders, and project delays that cost more than the equipment itself. Go with a single manufacturer, and you’re stuck waiting on their lead times, inventory, and timeline.
We rep six MUA manufacturers, so when one line is backordered, we pull from another. When your application needs a specific heating or cooling configuration, we spec it from the brand that builds it best.
One call, multiple options, most quotes back in 24 hours.
Send your blueprints – we handle the rest.
Need to size your makeup air unit? Use our free makeup air calculator to estimate your CFM and BTU heating load before requesting a quote.
Make-Up Air Diagram
Not sure which unit type fits your application? Read our guide on how to choose the right makeup air unit to compare direct-fired, indirect-fired, and electric options.
Tempered or Untempered – Pick Your Path
Every makeup air unit falls into one of two categories. Pick wrong, and you’re either overspending on conditioning you don’t need, or you’re dumping raw outdoor air into a climate-controlled space and watching your HVAC fight to keep up.
Tempered units condition incoming air before it reaches your space. That means heating, cooling, or both, depending on your climate and process requirements. If your facility runs temperature-sensitive operations or your region sees real winters, tempered is likely code-required, not optional.
Untempered units replace exhaust volume without conditioning. They work when your climate is mild, when your existing HVAC can absorb the load, or when the application doesn’t demand tight temperature control.
The wrong call here doesn’t show up on day one.
It shows up six months later when your energy bills spike, your workers complain, or an inspector flags the install. Getting this right upfront saves you the cost of a retrofit that would cost more than the original unit.
| Feature | Tempered | Untempered |
|---|---|---|
| What it does | Heats, cools, or both | Replaces air only |
| Best for | Climate-controlled facilities | Mild climates, secondary HVAC |
| Options | Heated · Cooled · Heated & Cooled | Unheated · Gravity · Recirculating |
RWA Ventilation Solutions is an authorized representative/distributor for the leading American manufacturers of makeup air equipment.
These manufacturers have selected us to represent them because of the skills of our sales engineers as well as our company mantra:
“Our knowledge is your knowledge”
Please click the button below for a quick quote or answers about commercial and/or industrial makeup air.
Six MUA Manufacturers. One Call.
Go direct to a MUA manufacturer, and you get one product line, one set of lead times, and one answer whether it fits your application or not. If their backlog is 16 weeks, that is your backlog too.
We rep 6 MUA manufacturers. That means when one brand is backordered, we pull from another.
When your specs call for a feature one manufacturer does not offer, we source from the one that does. You get the right unit for the job, not the only unit someone has available.
| Brand | Best For |
|---|---|
| Absolutaire | Heavy industrial, custom configurations |
| FloAire | Commercial kitchens, packaged units |
| Hartzell | High-temp, corrosive environments |
| Venco | Direct-fired heating, fast lead times |
| United Enertech | Energy recovery, DOAS systems |
| Canarm | Light commercial, budget-conscious projects |
We do not push one brand over another. We match the unit to your specs, your timeline, and your budget.
That is the difference between calling a manufacturer and calling a rep who knows all of them.
Ready to Spec Your MUA Unit?
You’ve got the exhaust load. You know the application.
Now you need a makeup air unit that matches the specs, fits the budget, and ships before your project timeline slips.
Send us your specs or give us a call. We’ll recommend the right configuration, pull options from six manufacturers, and get you a quote. Most responses come back within 24 hours.
Scott Williamson
Scott Williamson is an engineer specializing in industrial ventilation, including make-up air units.
His expertise has been recognized by leading business publications like HubSpot and Tech Bullion. Scott helps business owners find high-performance solutions that balance energy savings with daily operational needs.